OEM 2003 Toyota Sienna Brake Caliper

2003 Toyota Sienna Parts Questions & Experts Answers

• Q: How to service and repair the brake caliper on 2003 Toyota Sienna?

  A: Start brake caliper servicing and repair work by taking out the cylinder boot set ring and cylinder boot with a screwdriver. After positioning the piece of cloth between the piston and caliper use compressed air to push the piston from the cylinder while maintaining your fingers safe from the piston. First use a screwdriver to remove the piston seal before using the same tool to separate the torque plate sliding pins because the reinstallation process requires the sliding pin with sliding bushing to fit into the lower section while the one without bushing fits into the upper section. Install the new dust boots into their torque plate positions through the usage of a 24 mm socket and hammer which ensures the metal plate fits tightly. When performing this task tap out both dust boots with a screwdriver and hammer. Available for inspection is the pad lining thickness measurement requiring a replacement if thickness falls below 1.0 mm (0.039 inch) or presents severe wear indications. Check the disc thickness by using a micrometer until it reaches 26.0 mm (1.024 inch) minimum or if there are scoring marks or uneven wear patterns. A dial indicator set to 10 mm (0.39 inch) from the edge should be used to measure disc runout which must not exceed a maximum runout of 0.05 mm (0.0020 inch). Disc runout adjustment requires the removal of bolts and torque plate from the knuckle followed by removal of the hub nuts and disc. Reinstall the disc with its position 1/5 turn off center from original placement and torque hub nuts to 104 Nm (1,050 kgf-cm, 77 ft. lbs.). The runout measurement should keep repeating the adjustment process until the minimum runout reaches under 0.05 mm (0.0020 inch). Installation of the disc should happen in its current position unless you need to change discs and start the runout measurement again. After assembling the torque plate install the mounting bolts with a torque of 107 Nm (1,090 kgf-cm, 79 ft. lbs.). After reverse disassembly steps the technician will rebuild the system by applying lithium soap base glycol grease and disc brake grease to the specified parts.